1. usb interface and bus powered, no separate power supply or battery required, you can plug in/out in heat state. 2. password security feature to prevent disk access (optional). 3. data write-protect switch to anti-versus and prevent you from carelessly delete data. 4. easy plug and play function 5. high performance write up to 800k byte/s and read up to 970k byte/s. 6. state-of-the art nand flash memories. 7. embedded hub function allows partitioning of the usb flash disk into a 1mb auxiliary mass storage device disk and a primary secured main disk. 8. so no driver needed in windows me, 2000, xp, or above. only requires security device driver. 9. shock resistant, noise-free and longer data retention. 10. advanced power management mechanism. capacity: 128mb, 256mb, 512mb, 1gb